Formed viscose



Patented A gie, 1925 UNITED STATES PATENT OFFICE.

JOSEF HUBER, OF DESSA'U, IN ANHALT, AND PAUL ECKERT, OF DESSAU-ZIEBIGK, IN

.ANHALT, GERMANY, ASSIGNOBS '10 ACTIEN GESELLSCHAFT FU'R ANILIN FABRI- FORMED VISCOSE.

No Drawing.

To all whom it may concern:

Be it known that we, Josnr HUBER and PAUL ECKERT, citizens of the German Republic, residing at Dessau, in Anhalt, Germany, and Dessau-Ziebigk, in Anhalt, Germany, have invented certain new and useful Improvements in Formed Viscose, of which the following is a specification.

It is known to add mugi l agenp us egi;

tracts 0f tll e V86 l}2 l lllQ Q 1;ll;il 1 t0 the viscose or tTi'fiFnr cellulose from which the viscose is to be madeand in the French mlmere is described the addition of alkali silicates to theviscose for the purpose preventing the threads' fmm sticking together.

By the present invention inorganic colloids such as alkali silicates are added to the l e destined for; gggdl vih the xanthate.

Sum an addition to"-11e15 ?i1 as"aqaadirferent effectthan that which is obtained, when I'll; sanlile adidition is made to thefivisi cose. T e t rea s s arti cia horsehair an the like formed from such mixtures have particularly good physical properties. The artificial silk, for instance, has a greater strength, elongation, resistivity against abrasion, and is less hygroscopic. The invention is particularly adapted to the 80 production of products having a pronounced stiffness. For example artificial horsehair and artificial hemp have the desired stiffness. The filaments are for instance especially Application filed August 14, 1924. Serial No. 732,109.

adapted for the manufacture of incandescent mantles.

The following example illustrates, in what manner the invention may be performed, without limitin it.

To the le estined for dissolvin the xanthate ec nica so 1um s1 mate is added. 1e wor lng up a es pace as usual.

In our companion application Ser. No. 732,110, filed concurrently herewith we have disclosed the addition of emulsoids, such as ve etable mucila e, to the lye in which xantl'iate 1s to E dissolved for modifying the physical properties of viscose silk produced therefrom.

\Vhat we claim is,-

1. In the manufacture of formed viscose adding to the lye in which the xanthate is to be dissolved an inorganic colloid capable of modifying the physical properties of the formed viscose.

2. In the manufacture of formed viscose adding to the lye in which the xanthate is to be dissolved an alkali silicate.

' 3. In the manufacture of formed viscose adding to the lye in which the Kant-hate is to be dissolved sodium silicate.

In testimony whereof we aflix our signatures.

JOSEF HUBER. PAUL ECKERT. 

